Article
Chemistry, Physical
Evangelia Vasilaki, Nikos Katsarakis, Spyros Dokianakis, Maria Vamvakaki
Summary: Core-shell heterostructures with a flower-like morphology, consisting of a ZnO core and a TiO2 shell decorated with reduced graphene oxide (rGO) sheets, were reported to enhance absorption properties towards visible light range in semiconductors. The photocatalytic performance of the rGO-modified ZnO-TiO2 catalyst under visible light irradiation outperformed that of the parent ZnO-TiO2 core-shell structures, attributed to higher absorption and improved electron-hole separation in the ternary system.
Article
Engineering, Environmental
Rudzani Ratshiedana, Olayemi Jola Fakayode, Ajay Kumar Mishra, Alex Tawanda Kuvarega
Summary: The study focuses on the impact of silver ion doping on the photocatalytic activity of titanium dioxide for the degradation of tartrazine. Results show that optimal degradation of tartrazine can be achieved with a certain amount of doping, suggesting potential applications for removing similar organic pollutants from water.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Chemistry, Physical
Chaehun Lim, Ha-Rim An, Seongmin Ha, Seongjae Myeong, Chung Gi Min, Hea-Jong Chung, Byoungchul Son, Chang-Yeon Kim, Ji-In Park, Hyeran Kim, Hyun Uk Lee, Young-Seak Lee
Summary: We propose an underwater plasma method to produce nanoporous N-doped TiO2 (N-TiO2) photocatalysts with high reactivity in the visible light range. The unique energy input of this technology enables the synthesis, crystallization, doping, and porosity of TiO2 within minutes. The resulting N-TiO2 demonstrates a nanoporous structure with doped N atoms, which leads to narrow bandgap, effective charge-carrier separation, and enhanced light absorbing ability. The N-TiO2 photocatalysts exhibit efficient photocatalytic activities and excellent antibacterial ability, making them suitable for environmental and biomedical applications.
APPLIED SURFACE SCIENCE
(2023)
Article
Materials Science, Ceramics
Nguyen Thi Khanh Huyen, Thanh-Dong Pham, Nguyen Thi Dieu Cam, Pham Van Quan, Nguyen Van Noi, Nguyen Thi Hanh, Mai Hung Thanh Tung, Van-Duong Dao
Summary: The study demonstrates that adding titanium dopants can effectively enhance the photocatalytic activity of BiVO4 materials and reduce band gap energy. In the Ti-BiVO4 materials used, the particle size of Ti dopants is larger.
CERAMICS INTERNATIONAL
(2021)
Article
Engineering, Environmental
O. Ferreira, O. C. Monteiro, A. M. Botelho do Rego, A. M. Ferraria, M. Batista, R. Santos, S. Monteiro, M. Freire, E. R. Silva
Summary: Cobalt and nitrogen co-doped anatase nano-catalysts have shown efficient degradation of the waterborne pollutant triclosan under both UV and visible light, with antibacterial activity under UV-A light as well. The synthesized Co-TiO2-N catalyst exhibited the best photocatalytic activity, achieving nearly complete degradation of TCS in 20 minutes under UV and Vis LED lights. Additionally, the cobalt-doped catalysts demonstrated promising antibacterial effects against waterborne pathogens, highlighting their potential for water decontamination.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Environmental
Qianqian Hu, Yifan Liu, Weian Li, Yanqi Wang, Wenhua Liao, Hanxun Zou, Jianrong Li, Xiaoying Huang
Summary: This study presents a facile and environmentally friendly method for synthesizing C, N co-doped mesoporous TiO2 nanocrystals, using IL-assisted microwave synthesis, resulting in small-sized TiO2 with well-developed mesoporous structure and abundant C, N dopants. The material exhibits high specific-surface area, excellent hydrophilicity, elevated valence-band edges, abundant defect levels, and narrowed band-gap, leading to improved visible-light absorption, reduced photogenerated electron-hole recombination, and rapid charge transfer and surface-catalyzed reactions.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Nanoscience & Nanotechnology
Nagaraj Subbiah, Thanikaivelan Palanisamy
Summary: In this study, a visible-light-active Coll-Do-Ag@SiO2 nanocomposite was successfully synthesized and found to exhibit fast and effective photocatalytic disinfection of wastewater. The enhanced photocatalytic performance of the nanocomposite was attributed to stronger light absorption, low band gap energy, and low charge-transfer resistance. The destruction of bacterial cell walls and membranes led to bacterial death.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Physical
Lili Deng, Ningjie Fang, Shilin Wu, Song Shu, Yinghao Chu, Jiaxiu Guo, Wanglai Cen
Summary: This study successfully prepared a highly efficient and cost-effective photocatalyst system by constructing NiCoP core-shell structure on the surface of hollow CdS. The results demonstrated that NiCoP acted as an excellent co-catalyst, promoting the photocatalytic activity and stability of H-CdS.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Energy & Fuels
Nguyen Duc Manh, Shuoping Ding, Nghiem Thi Thuong, Nguyen Van Anh, Esteban Mejia
Summary: A facile route for synthesizing vanadium-doped TiO2 photocatalysts was developed, and the physicochemical properties of the prepared samples were characterized by different methods. The V-doped catalysts showed significantly enhanced photodegradation activity towards trichloroethylene compared to undoped TiO2 under aerobic conditions. Importantly, these V-doped catalysts exhibited high activity under both ultraviolet and visible light irradiation, and they were also recyclable for at least four consecutive runs without any activity loss.
Article
Engineering, Environmental
Alejandro Bembibre, Majdi Benamara, Mokhtar Hjiri, Elvira Gomez, Hatem R. Alamri, Ramzi Dhahri, Albert Serra
Summary: The study explores the efficient mineralization of tetracycline antibiotics using Ca-doped ZnO nanopowders under LED visible light and ultrasound irradiation. The catalyst exhibited high efficiency, reusability, and minimal sonophotocorrosion, especially in natural waters' pH range.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Materials Science, Ceramics
Dung Van Dao, Tran Thi Ngoc Bich, Nguyen Thi Thu Ha, Wenmeng Wang, Taehwan Kim, Hooyeon Kim, Pham Huynh Khanh Duy, Nguyen Ngoc Ha, Do Thi Thuy Van, In-Hwan Lee
Summary: Photocatalysis is a promising technology for removing pharmaceutical antibiotics. This study developed an active and stable Fe2O3@NGr core-shell platform for efficient degradation of cephalexin. The improved performance was attributed to the facile generation and transfer of electron-hole pairs and the active surface of the NGr shell that accelerated cephalexin removal.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Jiajia Wang, Lizhi Wang, Du Zhang, You Wang, Jiawei Li, Fa Zhou, Jianhan Huang, You-Nian Liu
Summary: In this study, covalently connected core-shell metal-organic frameworks (MOFs)@covalent-organic frameworks (COFs) hybrid materials were successfully synthesized. The hybrid materials exhibited high surface area and abundant unsaturated metal sites. The COFs shell provided excellent physicochemical stability, visible-light response, and suitable band gaps. The formed heterostructure showed improved CO2 photocatalytic reduction performance by enhancing electron transfer and separation of electron-hole pairs.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Physical
Dandan Peng, Ying Zhang, Guang Xu, Ye Tian, Di Ma, Yao Zhang
Summary: The enhanced visible light absorption, effective charge separation, and the presence of carbon all contribute significantly to the improvement of the photocatalytic performance of NiS1.03@C/N-TiO2 heterojunction photocatalysts for cyclohexane oxidation.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Yan Chen, Ao Li, Xiuli Fu, Zhijian Peng
Summary: This study proposes a simple and feasible method for preparing titanium oxide photocatalysts with reduced band gap, high electrical conductivity, and good chemical and structural stability. By co-doping N and F and oxygen deficiency, the visible light absorption and photocatalytic activity can be significantly enhanced. This work provides an important method for designing and fabricating high-performance titanium oxide photocatalysts.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Ruyue Yu, Yanxue Shang, Xue Zhang, Jianting Liu, Fangdou Zhang, Xu Du, Hongman Sun, Jingbin Zeng
Summary: Compared to UV-driven catalysts, the use of sunlight to design efficient visible light catalysts has been less explored. In this study, Fe3O4@ZnO@ZIF-8 three-component core-shell nanoparticles were prepared and their photocatalytic degradation performance was investigated under visible light using Rhodamine B (RhB) as a model contaminant. It was found that Fe3O4@ZnO@ZIF-8 achieved a significant enhancement in the photo-catalytic degradation efficiency with 98% of RhB degraded within 100 min, and a reaction rate constant of 0.0292 min-1. These findings highlight the importance of precise tailoring of core-shell Fe3O4@ZnO@ZIF-8 for achieving desired degradation efficiency of organic pollutants under visible light.
CATALYSIS COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Heqing Ye, Hyeok-jin Kwon, Su Cheol Shin, Hwi-young Lee, Young Ho Park, Xiaowu Tang, Ruxian Wang, Kanghyuck Lee, Jisu Hong, Zhijun Li, Wonkyo Jeong, Jiyeong Kim, Chan Eon Park, Jihoon Lee, Tae Kyu An, Insik In, Se Hyun Kim
Summary: This study demonstrates a novel strategy to induce high-k characteristics with durable polysilsesquioxane (PSQ)-based dielectrics, paving the way for the production of practical and printable high-k dielectrics for low-voltage-operating high-performance organic field-effect transistors (OFETs). Different PSQs exhibit distinct polarization phenomena, leading to different hysteresis behaviors during device operation.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Energy & Fuels
Wasinee Pholauyphon, Ravindra N. Bulakhe, Jedsada Manyam, Insik In, Peerasak Paoprasert
Summary: This study demonstrates the use of carbon dots as versatile additives for enhancing the performance of supercapacitors. By adding carbon dots to both the TiO2 electrode and Na2SO4 electrolyte, the specific capacitance of the supercapacitor was significantly improved, leading to a total improvement of 797%. The carbon dots also improved the rate capability and retention of specific capacitance after cycles.
Article
Chemistry, Analytical
Wasinee Pholauyphon, Ravindra N. Bulakhe, Jedsada Manyam, Insik In, Peerasak Paoprasert
Summary: In this study, the electrochemical performance of a nanocomposite composed of TiO2 nanoparticles and carbon dots (CDs) derived from sodium polyacrylate was investigated. The addition of CDs to both the electrode and the electrolyte resulted in a significant enhancement of the specific capacitance, attributed to the synergistic effects of reducing series resistance, enhancing surface wettability, diffusion-controlled contribution, and pathways for ion diffusion. This strategy shows promise for developing high-performance, stable, and cost-effective energy storage devices.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Physical
Shrikant Sadavar, Navnath S. Padalkar, Rohini B. Shinde, Saji T. Kochuveedu, Umakant M. Patil, Akash S. Patil, Ravindra N. Bulakhe, Chandrakant D. Lokhande, Insik In, Rahul R. Salunkhe, Jayavant L. Gunjakar
Summary: An exfoliation-reassembling process was used to develop mesoporous intercalative nanohybrids of cationic 2-D cobalt-chromium-layered double hydroxide nanosheets and polyoxovanadate anions, which exhibited promising performance in asymmetric supercapacitors devices.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Multidisciplinary
Tae Yun Ko, Daesin Kim, Seon Joon Kim, Hyerim Kim, Arun S. Nissimagoudar, Seung-Cheol Lee, Xiaobo Lin, Peter T. Cummings, Sehyun Doo, Seongmin Park, Tufail Hassan, Taegon Oh, Ari Chae, Jihoon Lee, Yury Gogotsi, Insik In, Chong Min Koo
Summary: The article introduces a novel ligand chemistry for MXenes using alkylated 3,4-dihydroxy-L-phenylalanine (ADOPA), which can functionalize MXene surfaces under mild reaction conditions. The ADOPA ligands form strong hydrogen-bonding and pi-electron interactions with the surface terminal groups of MXenes, while the hydrophobic fluorinated alkyl tail is compatible with organic solvents. This method produces stable colloidal solutions and liquid crystals of various MXenes in organic solvents, with excellent electrical conductivity, improved oxidation stability, and processability, enabling applications in flexible electrodes and electromagnetic interference shielding.
Article
Chemistry, Multidisciplinary
Heqing Ye, Eunji Park, Su Cheol Shin, G. Murali, Daehyun Kim, Jihoon Lee, In Ho Kim, Sung-Jin Kim, Se Hyun Kim, Yong Jin Jeong, Insik In
Summary: In this study, two types of UV curable high-k PSQs with different side chains were prepared. The structure of the side chains influenced the UV curing behavior and capacitance characteristics of the PSQ dielectrics. These findings demonstrate the potential of engineering PSQs for next generation integrated electronics.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Kaustuv Roy, Dong-Hyun Lee, Benny Ryplida, Insik In, Suk Ho Bhang, Sung Young Park
Summary: This research proposes a cancer-selective self-reporting sensor based on a redox-responsive mineralized conductive hydrogel (M-Hydrogel), which possesses cancer-specific viscosity, adhesive strength, stretchability, tunable conductivity, and fluorescence. The self-reporting nature of the M-Hydrogel sensor is highlighted when in the vicinity of a high glutathione (GSH) level, confirming the dependence of self-recognizable behavior on the cancer microenvironment. The M-Hydrogel demonstrates excellent ex situ sensing with tumor ablation, enabling real-time analysis coupled with the upregulation of pro-apoptotic markers P53 and BAX in the tumor.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Physics, Applied
C. Thota, G. Murali, R. Dhanalakshmi, M. Reddeppa, N. -H. Bak, G. Nagaraju, S. -G. Kim, J. K. R. Modigunta, Y. H. Park, Insik In, M. -D. Kim
Summary: In this study, 2D MXene nanosheets were spin-coated on 1D GaN nanorods to establish a van der Waals Schottky junction for efficient UV detection. The built-in electric field developed through this junction formation enhances the separation of electron-hole pairs, resulting in better UV detection performance compared to pristine GaN nanorods.
APPLIED PHYSICS LETTERS
(2023)
Article
Engineering, Environmental
Hyeong Jun Jo, Gwang-Bum Im, Akhmad Irhas Robby, Insik In, Suk Ho Bhang, Arnab Shit, Sung Young Park
Summary: The study introduces a cancer microenvironment-selective detection system using wireless pressure and strain sensing from a ROS-responsive carbon dot-embedded conductive hydrogel. The hydrogel's ROS scavenging activity and photothermal therapy eliminate tumor condition, and the hydrogel produces distinct electronic signals in the presence of cancer cells. The wireless sensor device allows for easy monitoring of conductivity and pressure on cellphones. Overall, this theragnostic sensor with direct anticancer activity via photothermal therapy is successfully constructed.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Young Ho Park, Dongyun Kim, Chaitanya B. Hiragond, Junho Lee, Jin-Woo Jung, Chang-Hee Cho, Insik In, Su-Il In
Summary: This study developed a highly stable photocatalyst for the reduction of CO2 to CO. By combining phase-controlled molybdenum sulfide with reduced titania, the obstacles of limited light absorption and poor charge separation were overcome, resulting in selective conversion of CO2.
JOURNAL OF CO2 UTILIZATION
(2023)
Article
Chemistry, Multidisciplinary
Ari Chae, G. Murali, Seul-Yi Lee, Jeonghwan Gwak, Seon Joon Kim, Yong Jin Jeong, Hansol Kang, Seongmin Park, Albert S. Lee, Dong-Yeun Koh, Insik In, Soo-Jin Park
Summary: Recently, MXene-based wearable hydrogels have become promising candidates for epidermal sensors due to their softness and unique properties. However, it is challenging to achieve reliable sensing performance and prolonged service life due to MXene oxidation in water-containing hydrogels. To address this issue, catechol-functionalized poly(vinyl alcohol) (PVA-CA)-based hydrogels are proposed to inhibit MXene oxidation, resulting in rapid self-healing and superior strain sensing behaviors. The PVA-CA-MXene hydrogel demonstrates potential for real-time motion monitoring and accurate signal classification using deep learning models.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Soyeon Kim, Canh Minh Vu, Suehyeun Kim, Insik In, Jihoon Lee
Summary: This study presents a facile strategy to improve the mechanical flexibility and electromagnetic interference (EMI) shielding of MXene films. The MX@DC film, created by crosslinking mussel-inspired molecule DC with MXene nanosheets, exhibited significantly enhanced toughness and Young's modulus compared to bare MXene films. The DC-coated MXene film also demonstrated improved EMI shielding effectiveness, making it suitable for practical applications.
Article
Nanoscience & Nanotechnology
Chandrasekaran Nithya, Jeevan Kumar Reddy Modigunta, Insik In, Soye Kim, Sukumaran Gopukumar
Summary: Hierarchical nanocomposites with surface active bonding features are efficient electrode materials for high-performance Li-/Na-/K-ion batteries. Tuning the physiochemical properties of these nanocomposites has a great impact on their electrochemical performance, attributed to the synergistic effect of different components. In this study, a hierarchical nanocomposite of bismuth sulfide (Bi2S3) nanorod bonded to reduced graphene oxide (rGO) matrix was synthesized and investigated as an anode material for potassium-ion batteries. The nanocomposite exhibited high reversible capacity, long-term cycling stability, and outstanding rate capability. The excellent performance was attributed to the active sites in rGO nanosheets that enhance electrical conductivity of Bi2S3 nanorods and prevent shuttle effect of polysulfide. The proposed phase transformation mechanism and structural stability of Bi2S3 nanorods were confirmed by ex-situ X-ray diffraction and high-resolution transmission electron microscopy analysis respectively. The surface dominated pseudocapacitive K-ion storage also played a major role in improving the electrochemical performance. A K-ion full cell was successfully assembled and showed stable cycling performance after 100 cycles at 1 C rate.
ACS APPLIED NANO MATERIALS
(2023)
Article
Engineering, Multidisciplinary
Tae Min Kim, Hyun Jeong Won, Jun-Ho Yang, Hayeon Jo, A. Hyeon Kim, Dohyun Nam, Seul Gi Kim, Eun-Jung Jin, Heung Jin Bae, Sung Young Park
Summary: A biocompatible hair-dyeing technology using a dark polyphenol complex (DPC) was developed in this study. The DPC enhanced the stability of hair coating and its ability to scavenge reactive oxygen species (ROS), resulting in improved hair properties and mechanical strength. The multicolor S-DPC exhibited antioxidant properties and high biocompatibility, making it a promising biomaterial for hair dyeing applications.
Article
Materials Science, Multidisciplinary
Hyun Jun Cho, Chul-Jun Yoon, Junbeom Park, Hansol Kang, Insik In, Seung Min Kim, Young-Kwan Kim
Summary: A simple and efficient reinforcement strategy for carbon nanotube (CNT) fibers was developed using natural urushiol as a crosslinking agent, greatly enhancing the mechanical and electrical properties of the fibers.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
